Human systems

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Across
  1. 4. _______ system is responsible for our body's exchange of gases with the surroundings
  2. 5. This organ pumps blood to all parts of our body
  3. 7. This gas enters our blood in our lungs
  4. 8. _________ blood is transported from our heart to our legs
  5. 10. This organ exchanges gases with the surroundings
Down
  1. 1. This organ connects the nose to our lungs
  2. 2. Our bodies take in oxygen and release ________________
  3. 3. _______ system is responsible for transporting oxygen, digested food and waste materials all over our body
  4. 6. _________ blood is transported from our heart to our lungs
  5. 9. In fishes, exchange of gases takes place here